581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
60 lines
2 KiB
C
60 lines
2 KiB
C
/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <semaphore.h>
|
|
#include <shlib-compat.h>
|
|
#include "semaphoreP.h"
|
|
#include <atomic.h>
|
|
|
|
|
|
int
|
|
__new_sem_getvalue (sem_t *sem, int *sval)
|
|
{
|
|
struct new_sem *isem = (struct new_sem *) sem;
|
|
|
|
/* XXX Check for valid SEM parameter. */
|
|
/* FIXME This uses relaxed MO, even though POSIX specifies that this function
|
|
should be linearizable. However, its debatable whether linearizability
|
|
is the right requirement. We need to follow up with POSIX and, if
|
|
necessary, use a stronger MO here and elsewhere (e.g., potentially
|
|
release MO in all places where we consume a token). */
|
|
|
|
#if __HAVE_64B_ATOMICS
|
|
*sval = atomic_load_relaxed (&isem->data) & SEM_VALUE_MASK;
|
|
#else
|
|
*sval = atomic_load_relaxed (&isem->value) >> SEM_VALUE_SHIFT;
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
versioned_symbol (libc, __new_sem_getvalue, sem_getvalue, GLIBC_2_34);
|
|
|
|
#if OTHER_SHLIB_COMPAT(libpthread, GLIBC_2_1, GLIBC_2_34)
|
|
compat_symbol (libpthread, __new_sem_getvalue, sem_getvalue, GLIBC_2_1);
|
|
#endif
|
|
|
|
#if OTHER_SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
|
|
int
|
|
__old_sem_getvalue (sem_t *sem, int *sval)
|
|
{
|
|
struct old_sem *isem = (struct old_sem *) sem;
|
|
*sval = isem->value;
|
|
return 0;
|
|
}
|
|
compat_symbol (libpthread, __old_sem_getvalue, sem_getvalue, GLIBC_2_0);
|
|
#endif
|